Cam selection Lunati Voodoo 10200704 vs other options

[70Roadkill]

So I have a 70 Swinger that I'm going to put in a 360 LA motor (74/75 vintage)

3.73 sure grip 8 3/4 rear axle
904 trans - I need to freshen it with all new steels, frictions, bands, etc.
Plan on running an air gap intake
750 vac secondary carb
I have 1.88-1.60 cast heads plan on doing some home blending / porting
using the .28 head gaskets
HP116CP pistons so should put me around 9.8 CR
std bore block
Probably use a 3500-4000 stall converter
Hughes adjustable rocker arms on banana shafts (non roller)
using a 275 MT ET street tire

Its a street/strip car, hoping to be a mid 12 car would love to touch high 11's but probably not possible with this combo.

The lunati voodoo I'm kicking around using is the 10200704 with 513/533, 234/242, 279/287, 110/106 cam. Wanted to get feedback on this set up or another cam thought.

I can't afford eddy heads so I'm on a budget. This is more than I can afford but somehow I'll get it done.

Or was thinking about going to the newer magnum roller, I hear you can get a little more with less from them.

Any and all constructive feedback is appreciated.

Thanks in advance

 

[skep419]

what are you mostly going to use the car for. Your about to go down a slippery slope.
AJ's Quest for the Funnest Street 360-4spd Combo;short version

 

[rumblefish360]

OMG! AJ has a short version?

Disclaimer for the babies on FABO

NO! I'm not picking on AJ! He has to thin a skin to take a joke.

 

[rumblefish360]

@70Roadkill

Don't do a Magnum cam because the lobes are smaller. The lift is Theoretical based on a 1.6 Magnum rocker vs. a 1.5 rocker of the LA.

I had issues with Lunati when they sent me at there tech supports suggestion the wrong cam and it took me a month to get me my money back.
MAKE SURE YOU GET A LONG SNOUT CAM FOR YOUR LA ENGINE!!!!

If you can reasonably port heads, that cam should be able to make over 400hp. If you can find thenflow rates of stock heads vs. your port work and take some measure of what was done in the past, look no further than the MP create engines.

The 360/360hp Comando engine was a (IIRC) 9.0-1 ratio with a purple cam, 284/484, 2.02-1.60 (stock) head, single plane and 1-3/4 headers w/a 750 carb.

The Magnum 360/380 was also a 9.0-1 stock long block with a single plane, 750, 1-3/4 header equipped engine that used a Hyd roller cam very similar to the Lunati. This engine constantly dynoed over 400hp.

 

[Ottmundr]

Dude,

Look up 72blunblu and his 340 duster. He has the 703 cam. See what he says about driving it on the street.

I am not an expert, but that 704 is probably waaaaay too big for the street.

 

[rumblefish360]

Dude,

Look up 72blunblu and his 340 duster. He has the 703 cam. See what he says about driving it on the street.

I am not an expert, but that 704 is probably waaaaay too big for the street.

You mean there is such a thing as to big a cam for the street?!?!?!
Naaa....

Not his, IMO at least since it is only 230*@.050, it is in line with millions of street machines over the years. 2000-6000 rpm for Hyd cams, a little wider for rollers.

 

[SBDart]

You mean there is such a thing as to big a cam for the street?!?!?!
Naaa....

Not his, IMO at least since it is only 230*@.050, it is in line with millions of street machines over the years. 2000-6000 rpm for Hyd cams, a little wider for rollers.

 

[rumblefish360]

Type reply outside of quote tags ;)

 

[72bluNblu]

Dude,

Look up 72blunblu and his 340 duster. He has the 703 cam. See what he says about driving it on the street.

I am not an expert, but that 704 is probably waaaaay too big for the street.

Actually, the 704 is what I have in the 340 in my Duster.

My 340 is a '68 that's .060" over, compression is about 9.8:1 with a set of ported 308 heads. Heads flow 264 cfm @ .500" lift and have 2.02/1.60 valves. I run it with a eddy rpm airgap intake, holley 750 DP, and doug's headers into a 2.5" dual exhaust. I have 3.55's in the car now with 26" tall rear tires and an 833 with a 3.09 first gear. My Duster is my daily driver, so, my comments about driveability are based on driving it almost everyday, freeway, traffic, all of it.

So, with that in mind, the 704 is a bit big for a daily driver. Below about 2,200 rpm with any kind of load and you risk lugging the engine, it really prefers to be above 2,200 with any kind of load (uphill, acceleration etc). Things really don't come alive until almost 3k rpm, with that cam and the 340 the car is really a lot happier if you drive it like you stole it. Cruising around town isn't really what it's set up for, so driving it more, let's say responsibly, takes a bit more clutch work on take off and between gears if you're short shifting. It needs more gear out back, and my plan is to go at least 3.91 when I get my T56 installed, although I may even go 4.10 or 4.30. I'd go to 3.91's now if it weren't for my frequent freeway driving. 3.73's with 275/60/15's will actually be like a 3.41 gear ratio compared to my 3.55's and 275/35/18's, so, if you want to run the 704 I'd plan on at least 3.91's. For a street/strip car it probably isn't an issue, but for a frequent driver the 704 is big enough to cause some driveability issues. It's doable, I mean, I do it and it works and I'm not going to downsize the cam. But if I were setting up the build again for a driver I'd probably keep it at a 703 instead. The T56 and gears will solve most of my issues I think, make it easier to take off and still have the overdrive for the freeway.

Here's the 704 at idle, probably around 800 rpm in this video.

 

[sireland67]

I have the one size smaller in my duster, and it does not have a lot of bottom in torque, going to play with some different gear ratios to help it out.
I have learned one thing over the years, when on the fence between two different cams, pick the smaller one, you will be alot happier with the results on the street, and the way the car drives.

 

[72bluNblu]

I have the one size smaller in my duster, and it does not have a lot of bottom in torque, going to play with some different gear ratios to help it out.
I have learned one thing over the years, when on the fence between two different cams, pick the smaller one, you will be alot happier with the results on the street, and the way the car drives.

What gears are you running?

 

[sireland67]

Currently 3.23, pathetic.
I have a fresh 4.30 and a used set of 5.38 to play with.
I also have a extra 8.75 set of 2.76 I could change to what ever ratio.
I also bought a 70 cuda 340 4-speed car last night, that I might part out, it may have a 3.55 or 3.91, never bothered to check.

 

[rumblefish360]

Yeaaaa, 3.23 to small. I'd consider 3.55's a min gear. Easy to fix!

 

[72bluNblu]

Currently 3.23, pathetic.
I have a fresh 4.30 and a used set of 5.38 to play with.
I also have a extra 8.75 set of 2.76 I could change to what ever ratio.
I also bought a 70 cuda 340 4-speed car last night, that I might part out, it may have a 3.55 or 3.91, never bothered to check.

Huh. I would have thought that 3.23's would be fine with the 703. That's the cam I've got in the 318 I built for my '71 Dart, and actually I was planning on running 3.23's in that car. What engine/trans are you running in that car and how tall are the tires?

I actually ran my Duster around with 2.94's for awhile with the 704 cam, that took some clutch work at take off!

 

[sireland67]

Yeaaaa, 3.23 to small. I'd consider 3.55's a min gear. Easy to fix!

I know that is why I built the new 4.30, but I do basically have the option for about any gear.

 

[70Roadkill]

Hey guys thanks for the posts today. I suppose I could always run a lower gear set in the trans as well to get her moving. I'll take a look at both the 703 and 704 closer and see what I want to do. Great feedback on both. Thanks.

 

[rumblefish360]

The 3.23 & 703. Am would work fine but IMO not with the bigger 704 cam @ 230 @ .050 intake duration.

It'll go and have what seems like a rev for ever in gear feeling. It will also take a bit to get into a good little bit to get that acceleration feeling going on.

 

[sireland67]

Huh. I would have thought that 3.23's would be fine with the 703. That's the cam I've got in the 318 I built for my '71 Dart, and actually I was planning on running 3.23's in that car. What engine/trans are you running in that car and how tall are the tires?

I actually ran my Duster around with 2.94's for awhile with the 704 cam, that took some clutch work at take off!

.030 340, KB 243, stock X heads, straight 4-speed, the tires are tall 275's so 27-28" tall.
The motor should be making some torque, because I have it choked off with a LD340 and stock 340 manifolds, it just needs alot more gear for a play toy.

 

[rumblefish360]

Ehhhhh, not so much at the intake.... but it's not all bad. Your right about addain't more gear to it though!

 

[sireland67]

Ehhhhh, not so much at the intake.... but it's not all bad. Your right about addain't more gear to it though!

I just used what I had sitting around when I put it together.
I figured I would just use my left over parts to throw this thing together, but as with everything else, I keep buying more crap, so now I am almost ready to throw a e-body together out of two cars, and whats left that I did not use on the duster.
Found a few more parts since then.

 

[rumblefish360]

I am almost at that point as well. I have enough pot lying around that I am thinking about putting together an engine. I kind of like a, use what I got, what's left over, keep Internet crap, throw together engine. And It will probably rock! If it ever comes to fruition, I'll post it up.

 

[72bluNblu]

.030 340, KB 243, stock X heads, straight 4-speed, the tires are tall 275's so 27-28" tall.
The motor should be making some torque, because I have it choked off with a LD340 and stock 340 manifolds, it just needs alot more gear for a play toy.

Oh ok. That makes more sense with the rear tires being that tall, 275/60/15's are 28" tall. 28" tall tires and 3.23's would be about the same as a 2.96 rear gear with the 245/45/17's I'm planning on running on my Dart. With 3.23's in the dart that would be almost like 3.55's with your 275's.

The 318 in my Dart is .025" over, compression is about 9.6:1 with a set of RHS X-heads. 1.92/1.60 valves, it'll have a airgap and Doug's headers. Haven't completely decided on the carb, probably a 670 street avenger I have already if I can make it work. It's an auto though, got to get a converter with a stall around 2400 according to Lunati. I've gone back and forth between the 3.23's and a set of 2.94's I've got, but I'll probably be better off with the 3.23's. Have to see how the 318 turns out I guess. Should be a solid little engine.

I just used what I had sitting around when I put it together.
I figured I would just use my left over parts to throw this thing together, but as with everything else, I keep buying more crap, so now I am almost ready to throw a e-body together out of two cars, and whats left that I did not use on the duster.
Found a few more parts since then.

Haha! welcome to my world. I built my Duster mostly out of parts I already had. Between the Challenger, the two Dart's, the Duster and a '71 Satellite I've collected enough parts to keep me busy for a lifetime.

 

[273]

OMG! AJ has a short version?

Disclaimer for the babies on FABO

NO! I'm not picking on AJ! He has to thin a skin to take a joke.

Lol
That's awesome

 

[sireland67]

Oh ok. That makes more sense with the rear tires being that tall, 275/60/15's are 28" tall. 28" tall tires and 3.23's would be about the same as a 2.96 rear gear with the 245/45/17's I'm planning on running on my Dart. With 3.23's in the dart that would be almost like 3.55's with your 275's.

The 318 in my Dart is .025" over, compression is about 9.6:1 with a set of RHS X-heads. 1.92/1.60 valves, it'll have a airgap and Doug's headers. Haven't completely decided on the carb, probably a 670 street avenger I have already if I can make it work. It's an auto though, got to get a converter with a stall around 2400 according to Lunati. I've gone back and forth between the 3.23's and a set of 2.94's I've got, but I'll probably be better off with the 3.23's. Have to see how the 318 turns out I guess. Should be a solid little engine.



Haha! welcome to my world. I built my Duster mostly out of parts I already had. Between the Challenger, the two Dart's, the Duster and a '71 Satellite I've collected enough parts to keep me busy for a lifetime.

I think we have hijacked the op thread enough, when I was young, first marriage and in college, I bought old mopar muscle cars and dodge trucks when they were cheap and parted them out.
I lived on the old family farm at the time and still have to this day a 40 x 60 barn that is two stories, and full of parts, I honestly do not know what I have in there, but usually I can find it if I remember where I put it, or if I remember if I parted one.
The e body thing started this spring when I found a gauge cluster when I was looking for something, and said to my self, I need to find something to put this in.

 

[crackedback]

So I have a 70 Swinger that I'm going to put in a 360 LA motor (74/75 vintage)

3.73 sure grip 8 3/4 rear axle
904 trans - I need to freshen it with all new steels, frictions, bands, etc.
Plan on running an air gap intake
750 vac secondary carb
I have 1.88-1.60 cast heads plan on doing some home blending / porting
using the .28 head gaskets
HP116CP pistons so should put me around 9.8 CR
std bore block
Probably use a 3500-4000 stall converter
Hughes adjustable rocker arms on banana shafts (non roller)
using a 275 MT ET street tire

Its a street/strip car, hoping to be a mid 12 car would love to touch high 11's but probably not possible with this combo.

The lunati voodoo I'm kicking around using is the 10200704 with 513/533, 234/242, 279/287, 110/106 cam. Wanted to get feedback on this set up or another cam thought.

I can't afford eddy heads so I'm on a budget. This is more than I can afford but somehow I'll get it done.

Or was thinking about going to the newer magnum roller, I hear you can get a little more with less from them.

Any and all constructive feedback is appreciated.

Thanks in advance

The 704 will work fine with the bolded items. Get the idle tune up correct and move up from there.